Add ensure_resources() function

New function "ensure_resources()" to support passing hash as parameter OR from hiera backend

This new function is extension of ensure_resource() which will now support to pass multiple values as hash/array OR from hiera backend variables in title argument with additional parameters needed.

It will
process multiple values for a resource type from the passed argument & pass each entry (type, title, params) to ensure_resource() in required format for further processing.
Now user can have duplicate resource check functionality extended to multiple entries with this new function.

Use:
For multiple resources using
hash:
ensure_resources('user', {'dan' => { gid => 'mygroup', uid =>'600' } ,  'alex' => { gid => 'mygroup' }}, {'ensure' =>'present'})

From Hiera Backend:

userlist:
  dan:
    gid: 'mygroup'

uid: '600'
  alex:
 gid: 'mygroup'

Call:
ensure_resources('user',hiera_hash('userlist'), {'ensure' => 'present'})

ensure_packages()
Modified to also support Hash type argument for packages

This modification will call newly added ensure_resources() for processing Hash as second argument.
The original functionality remains same for Array type arguments.

Use:
hiera:

packagelist:
  ksh:
    ensure: latest
  mlocate: {}
  myrpm:
    provider: rpm
    source: "/tmp/myrpm-1.0.0.x86_64.rpm"
    install_options:
      --prefix:
        /users/home
  openssl:
    provider: rpm
    source: "/tmp/openssl-1.0.1e-42.el7.x86_64.rpm"

Call:
ensure_packages($packagelist)

1 files changed, 19 insertions, 8 deletions

diff --git a/lib/puppet/parser/functions/ensure_packages.rb b/lib/puppet/parser/functions/ensure_packages.rb
index f1da4aa..532b702 100644
--- a/lib/puppet/parser/functions/ensure_packages.rb
+++ b/lib/puppet/parser/functions/ensure_packages.rb
@@ -17,18 +17,29 @@ third argument to the ensure_resource() function.
       raise(Puppet::ParseError, 'ensure_packages(): Requires second argument to be a Hash')
     end
 
-    packages = Array(arguments[0])
+    if arguments[0].is_a?(Hash)
+      if arguments[1]
+        defaults = { 'ensure' => 'present' }.merge(arguments[1])
+      else
+        defaults = { 'ensure' => 'present' }
+      end
 
-    if arguments[1]
-      defaults = { 'ensure' => 'present' }.merge(arguments[1])
+      Puppet::Parser::Functions.function(:ensure_resources)
+      function_ensure_resources(['package', Hash(arguments[0]), defaults ])
     else
-      defaults = { 'ensure' => 'present' }
-    end
+      packages = Array(arguments[0])
+
+      if arguments[1]
+        defaults = { 'ensure' => 'present' }.merge(arguments[1])
+      else
+        defaults = { 'ensure' => 'present' }
+      end
 
-    Puppet::Parser::Functions.function(:ensure_resource)
-    packages.each { |package_name|
-      function_ensure_resource(['package', package_name, defaults ])
+      Puppet::Parser::Functions.function(:ensure_resource)
+      packages.each { |package_name|
+        function_ensure_resource(['package', package_name, defaults ])
     }
+    end
   end
 end